Reddit Promoting

I’ve had a fair amount of success posting on Reddit. But every time I try to branch out into new subreddits, I’m blocked due to my lack of comment karma. I’ve been trying to add genuine comments where I can, but it’s slow going.

Does anyone have any rough estimates for the amount of comment karma needed for posting on subreddits that have a minimum? Just to know when I should start trying to branch out again, because so far it’s just been wasted time.